Towel bar



FIG. 1 is a perspective view of a towel bar showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view.

The components of the display shown in broken lines illustrate portions of the towel bar which form no part of the claimed design. 

CLAIM What is claimed is the ornamental design for a towel bar, as shown and described. 